title: Estimating elasticity in heterogeneous phantoms using Digital Image Elasto-Tomography.
abstract: Results from the application of a Digital Image Elasto-Tomography (DIET) system to elasticity distribution estimation in heterogeneous phantoms are presented. Two simple phantoms comprising distinct hard and soft regions were created from silicone, with harmonic surface motion data captured using a steady-state stereo imaging setup. A two-parameter approach to estimating stiffness distribution was used, applying both corroborative and contradictive methods to the inverse problem. The contradictive approach proved more robust in the presence of error in a priori stiffness assumption. These contrast based methods have the ability to reduce the number of parameters required for shape-based stiffness reconstructions, and present a novel approach to inclusion imaging in elastography.
authors.affiliation: Department of Mechanical Engineering, University of Canterbury, Christchurch, New Zealand.
authors.forename: Ashton
authors.initials: A
authors.lastname: Peters
authors.forename: J Geoffrey
authors.initials: JG
authors.lastname: Chase
authors.forename: Elijah E W
authors.initials: EE
authors.lastname: Van Houten
mesh_terms: D004548:Elasticity; D054459:Elasticity Imaging Techniques / Q000379:methods*; D020342:Finite Element Analysis; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods; D019047:Phantoms, Imaging; D012826:Silicone Elastomers
chemical_list: D012826:Silicone Elastomers